CA3221193A1 - Data transmission method, device, and storage medium - Google Patents

Data transmission method, device, and storage medium

Info

Publication number
CA3221193A1
CA3221193A1 CA3221193A CA3221193A CA3221193A1 CA 3221193 A1 CA3221193 A1 CA 3221193A1 CA 3221193 A CA3221193 A CA 3221193A CA 3221193 A CA3221193 A CA 3221193A CA 3221193 A1 CA3221193 A1 CA 3221193A1
Authority
CA
Canada
Prior art keywords
modulation
mcs index
rapsk
index table
mapping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CA3221193A
Other languages
French (fr)
Inventor
Chulong LIANG
Jin Xu
Liguang LI
Guanghui Yu
Jian KANG
Qiang Fu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of CA3221193A1 publication Critical patent/CA3221193A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation

Abstract

The present application provides a data transmission method, a device, and a storage medium. The method comprises: sending a modulation and coding scheme (MCS) index value to a second communication node, wherein the MCS index value is used for indicating one group of parameters in an MCS index table, and a modulation mode corresponding to at least one group of parameters in the MCS index table is Regular Amplitude Phase Shift Keying (RAPSK) modulation.

Description

DATA TRANSMISSION METHOD, DEVICE, AND STORAGE MEDIUM
CROSS-REFERENCE TO RELATED APPLICATION
This application is filed on the basis of the Chinese patent application No.
202110615507.8 filed June 2, 2021, and claims priority of the Chinese patent application, the entire contents of which are incorporated herein by reference.
TECHNICAL FIELD
The present disclosure relates to the field of communication, and in particular to a method and device for data transmission, and a storage medium.
BACKGROUND
Gap in performance exists between the Quadrature Amplitude Modulation (QAM) signal in the fifth Generation mobile communications (5G) standard and capacity-approaching Gaussian Signaling. With the increase in transmission Spectral Efficiency (SE), the gap will exceed 1 dB (in extreme cases, the gap is 1.53 dB). That is, in order to achieve the same spectral efficiency, QAM
signals require an increase in the Signal-to-Noise Ratio (SNR) by more than 1 dB compared with Gaussian signals. Under the same spectral efficiency, in order to achieve the same Block Error Rate (BLER), specific bit interleaving and modulation mapping schemes are employed, such that the required SNR of the regular amplitude phase shift keying (RAPSK) constellation is lower than that of the QAM constellation in the 5G standard. Consequently, it is important to design a Modulation and Coding Scheme, MCS) index table for RAPSK constellation.
SUMMARY
In view of this, there is provided a method and a device for data transmission, and a storage medium in some embodiment of the present, disclosure which achieves the configuration of the MCS index table for RAPSK constellation, thus reducing the receiving signal-to-noise ratio on the basis of ensuring the same block error rate.
An embodiment of the present disclosure provides a method for data transmission, which is applied to a first communication node, the method includes, sending a Modulation and Coding Scheme (MCS) index value to a second communication node; where the MCS index value is indicative of one set of parameters in an MCS index table; and the modulation scheme corresponding to at least one group of parameters in the MCS index table is Regular Amplitude Phase Shift Keying (RAPSK) modulation.
An embodiment of the present disclosure provides a method for data transmission, which is applied to a second communication node, the method includes, receiving a Modulation and Coding Scheme (MCS) index value sent by a first communication node; where the MCS
index value is indicative of one set of parameters in an MCS index table; and the modulation scheme corresponding to at least one group of parameters in the MCS index table is Regular Amplitude Phase Shift Keying (RAPSK) modulation.
An embodiment of the present disclosure provides an apparatus for data transmission, which includes a communication module, a memory and, at least one processor; the communication module is configured to perform communication interaction between a first communication node and a second communication node; the memory is configured to store at least one program which, when executed by the at least one processor, causes the at least one processor to carry out the method as claimed in any one of the embodiments described above.
An embodiment of the present disclosure provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to carry out the method as described in any one embodiment as described above.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 depicts a schematic diagram showing a RAPSK modulation constellation in the prior art;
FIG. 2 depicts a flowchart showing a method for data transmission according to an embodiment of the present disclosure;
FIG. 3 depicts a flowchart showing a method for data transmission according to another
2 embodiment of the present disclosure;
FIG. 4 depicts a schematic diagram showing a RAPSK modulation constellation according to an embodiment of the present disclosure;
FIG. 5 depicts a schematic diagram showing the gap between the bit-level mutual information of RAPSK modulation, QPSK modulation and QAM modulation with different modulation orders and the Shannon limit;
FIG. 6 depicts a schematic diagram showing a device for data transmission according to an embodiment of the present disclosure;
FIG. 7 depicts a schematic diagram showing a device for data transmission according to another embodiment of the present disclosure; and FIG. 8 depicts a schematic block diagram showing an apparatus for data transmission according to an embodiment of the present disclosure.
DETAILED DESCRIPTION
Some embodiments of the present disclosure will be further illustrated with reference to the drawings. Some embodiments of the present disclosure will be described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are intended only for illustration of the present disclosure, but are not intended for limitations to the present disclosure.
During data transmission of the 5G standard, QAM signals require an increase in the receiving signal-to-noise ratio by more than ldB in order to achieve the same spectral efficiency, as compared with Gaussian signals. In order to reduce the receiving signal-to-noise ratio and meanwhile achieve the same spectral efficiency, one solution is geometrical shaping, that is, designing a new signal constellation to approximate Gaussian signals. In particular, constellation is a complex set having finite elements, and an element in the set is called a constellation point.
For a constellation having 22"2 constellation points, Qm is called the modulation order of the constellation, where Qm is a positive integer.
A typical geometric shaping is Amplitude Phase Shift Keying (APSK), which has been applied in a new generation digital satellite broadcasting standard (Digital Video Broadcasting 2nd
3 Generation, DVB-S2). This constellation is characterized by:
(1) All constellation points fall on Na (Na > 1) concentric circles, and each circle is also called a ring;
(2) The constellation points on the same ring are equally spaced, that is, the phase differences between each pair of adjacent constellation points are constant;
(3) For i = 0,1,= = =Na -1 , the constellation points on the i -th ring have a common phase offset oz.
The above characteristics can be expressed by the equation:
rc, = exp j H2 = i + 00) i = 0,1, === , no - 1 no x = ri = exp j (-2n. = i ei) = =
2/r '1..Na-1 = exp + ONo-i) i = 0,1, == = , nNa_i -In particular, 0 < ro <r1 < < rNo-i are the radius of Na concentric rings, n, and et are the number of constellation points on the ring with radius r, and the phase offset of constellation points, and j = -µf is the imaginary unit.
The design of MCS Index table based on APSK constellation according to the present disclosure includes:
(1) Design of coordinates of constellation points, i.e., the design of APSK
constellation parameters;
(2) Design of mapping from bits to constellation points, which is also called modulation mapping;
(3) Design of parameters required in the MCS table.
Under the same spectral efficiency, in order to achieve the same BLER, RAPSK
constellation reduces the required SNR compared with QAM constellation in 5G standard by means of specific bit interleaving and modulation mapping scheme, and an increase in modulation order would result in a reduction in the SNR. Therefore, there is proposed MCS table design based on RAPSK
constellation in the present disclosure.
4 In the 5G standard, the process of bit interleaving and modulation mapping after Low Density Parity Check (LDPC) channel encoding and rate matching is as follows:
(1) Bit interleaving: The bit sequence e0,e1,e2===,eõ1 is first subjected to channel encoding and rate matching, and then is interleaved to a bit sequence A , , A = .., fE_, as follows, where Qm is the modulation order of the QAM constellation.
for j = 0 to E/Qm-1 for i = 0 to Qm-1 fi+i=Qm = ei*E1Qm+i end end for During the interleaving as discussed above, the bit sequences e0, e1, e2 ===,eE_I are arranged into a matrix of Qm rows and ElQm columns in the so-called "first row then column" manner that the elements are arranged from left to right in the first row on the top-most, if the first row is full, then to the second row, and so on, the elements in the matrix are then one-to-one corresponding to a matrix of Qm rows and E/Qm columns in which the bit sequences f0, are arranged in rows and columns, in the so-called "first column then row" manner that the elements are arranged from top to bottom right in the first column to the left-most, if the first column is full, then to the second column, and so on. For example, if Qm =4 and E=24, the above bit interleaving can be expressed as a matrix:
fo f4 f8 f12 f16 f20 eo el e2 e3 e4 e5 fs f9 f13 f17 f211 le, e7 e8 e9 e10 ell!
f2 f6 Ao f14 fis 1.22 e12 e13 e14 e15 elo e171' f3 f7 fii fis fi9 f23 els e19 e20 e21 e22 e23 (2) modulation mapping: a modulation mapper takes a binary digit either 0 or 1 as an input and generates a complex-valued modulation symbol as an output.
0 n/2- Binary Phase Shift Keying (BPSK) For 7c/2-BPSK modulation, bit b(i) is mapped to complex-valued modulation symbol d(i) ,which follows
5 e11 m0 2) d(i) = [(1 ¨ 2b(i)) + j (1 ¨ 2b (0)]

BPSK
For BPSK modulation, bit b(i) is mapped into a complex-valued modulation symbol d(i) , which follows r d(i) = 1 L(1¨ 2b(i))+ j (1¨ 2b(i))1 Quadrature phase shift keying (QPSK) For QPSK modulation, a pair of bits b(2i) and b(2i+1) are mapped into a complex-valued modulation symbol d(i), which follows (d (1) = 1- 2b(2i))+ j(1- 2b(2i +1))1 For 16QAM modulation, a quadruplet of bits b (4i), b (4i+1), b (4i+2) and b (4i+3) are mapped into a complex-valued modulation symbol d (i) , which follows d(i)= 41- 2b(4i))12 - (1- 2b(4i + 2))1+ j(1- 2b(4i +1))[2 - (1- 2b (41 + 3))1}

For 64QAM modulation, a hextuplet of bits b (6i), b (6i+1), b (6i+2), b (6i+3), b (6i+4) and b (6i+5) are mapped into a complex-valued modulation symbol d(i) , which follows d(i)- _______ 41- 2b(6i))[4-(1- 2b(6i+ 2))[2-(1-2b(6i +OM j(1- 2b(6i+1))[4-(1-2b(6i + 3))E2 -(1- 2b(6i+5))11) For 256QAM modulation, an octuplet of bits b (8i), b (8i+1), b (8i+2), b (8i+3), b (8i+4), b (8i+5), b (8i+6) and b(8i+7) are mapped into a complex-valued modulation symbol 61(i) , which follows d(i) - 1(1 2b(8i))[8 - (1- 2b(8i + 2))[4 - (1- 2b (8i + 4))[2 - (1- 2b (8i + 6))111 ,I17 0 +1(1- 2b(8i +1))[8 - (1- 2b (8i + 3))[4 - (1- 2b(81 + 5))[2- (1- 2b(81+ 7))j]}
6 where j = Ti in the above equations represents the imaginary unit. From the above equations, it can be seen that the modulation mapping of QAM modulation with modulation order Qm follows the following rules:
(1) bit b (Qm.i) determines the sign (either "+" or "-") of the real part of the complex-valued modulation symbol d(i).
(2) bit b (Qm=i+1) determines the sign of the imaginary part of the complex-valued modulation symbol d(i).
(3) bits b (Qm=i+2), b (Qm=i+Qm-2) determine the absolute value of the real part of the complex-valued modulation symbol d(i).
(4) bits b (Qm=i+3), b (Qm=i+Qm-1) determine the absolute value of the imaginary part of the complex-valued modulation symbol d(i).
In the 5G standard, the MCS index table based on QAM modulation is shown in Table 1-Table 5. When the modulation order Qm=1, n/2-BPSK modulation is employed. When the modulation order Qm=2, QPSK modulation is employed. When the modulation order Qm=4, 16QAM modulation is employed. When the modulation order Qm=6, 64QAM modulation is employed. When the modulation order Qm=8, 256QAM modulation is employed. In Table 4 and Table 5, if the higher layer parameter "tp-pi2BPSK" is configured, then q=1, otherwise q=2.
Table 1 MCS index table #1 based on PDSCH
MCS Index Modulation Order Spectral Target code Rate R x [1024]
Imcs Qm efficiency 0 2 120 0.2344 1 2 157 0.3066 2 2 193 0.3770 3 2 251 0.4902 4 2 308 0.6016 5 2 379 0.7402 6 2 449 0.8770
7 2 526 1.0273
8 2 602 1.1758
9 2 679 1.3262
10 4 340 1.3281
11 4 378 1.4766
12 4 434 1.6953
13 4 490 1.9141
14 4 553 2.1602
15 4 616 2.4063
16 4 658 2.5703
17 6 438 2.5664
18 6 466 2.7305
19 6 517 3.0293
20 6 567 3.3223
21 6 616 3.6094
22 6 666 3.9023
23 6 719 4.2129
24 6 772 4.5234
25 6 822 4.8164
26 6 873 5.1152
27 6 910 5.3320
28 6 948 5.5547
29 2 reserved
30 4 reserved
31 6 reserved Table 2 MCS index table #2 based on PDSCH
MCS Index Modulation Order Spectral Target code Rate R x [1024]
Imcs Q. efficiency 0 2 120 0.2344 1 2 193 0.3770 2 2 308 0.6016 3 2 449 0.8770 4 2 602 1.1758 4 378 1.4766 6 4 434 1.6953 7 4 490 1.9141 8 4 553 2.1602 9 4 616 2.4063 4 658 2.5703 11 6 466 2.7305 12 6 517 3.0293 13 6 567 3.3223 14 6 616 3.6094 6 666 3.9023 16 6 719 4.2129 17 6 772 4.5234 18 6 822 4.8164 19 6 873 5.1152 8 682.5 5.3320 21 8 711 5.5547 22 8 754 5.8906 23 8 797 6.2266 24 8 841 6.5703 8 885 6.9141 26 8 916.5 7.1602 27 8 948 7.4063 28 2 reserved 29 4 reserved 6 reserved 31 8 reserved Table 3 MCS index table #3 based on PDSCH
MCS Index Modulation Order Spectral Target code Rate R x [1024]
/mcs Qm efficiency 0 2 30 0.0586 1 2 40 0.0781 2 2 50 0.0977 3 2 64 0.1250 4 2 78 0.1523 5 2 99 0.1934 6 2 120 0.2344 0.3066 0.3770 0.4902 2 308 0.6016 0.7402 0.8770 1.0273 1.1758 4 340 1.3281 1.4766 1.6953 1.9141 2.1602 4 616 2.4063 2.5664 2.7305 3.0293 3.3223 6 616 3.6094 3.9023 4.2129 4.5234 29 2 reserved 4 reserved 31 6 reserved Table 4 MCS index table #1 of PUSCH based on precoding and 64QAM
MCS Index Modulation Order Spectral Target code Rate R x 1024 hics Qui efficiency 0 q 2401q 0.2344 1 q 314/q 0.3066 2 2 193 0.3770 3 2 251 0.4902 4 2 308 0.6016 2 379 0.7402 0.8770 1.0273 1.1758 1.3262 4 340 1.3281 1.4766 1.6953 1.9141 2.1602 4 616 2.4063 2.5703 2.7305 3.0293 3.3223 6 616 3.6094 3.9023 4.2129 4.5234 4.8164 6 873 5.1152 5.3320 5.5547 28 q reserved 29 2 reserved 4 reserved 31 6 reserved Table 5 MCS index table #2 of PUSCH based on precoding and 64QAM
MCS Index Modulation Order Spectral Target code Rate R x 1024 'ma Qui efficiency 0 q 60/q 0.0586 1 q 80/q 0.0781 2 q 100/q 0.0977 3 q 128/q 0.1250 4 q 156/q 0.1523 q 198/q 0.1934 6 2 120 0.2344 7 2 157 0.3066 8 2 193 0.3770 9 2 251 0.4902 2 308 0.6016 11 2 379 0.7402 12 2 449 0.8770 13 2 526 1.0273 14 2 602 1.1758 2 679 1.3262 16 4 378 1.4766 17 4 434 1.6953 18 4 490 1.9141 19 4 553 2.1602 4 616 2.4063 21 4 658 2.5703 22 4 699 2.7305 23 4 772 3.0156 24 6 567 3.3223 6 616 3.6094 26 6 666 3.9023 27 6 772 4.5234 28 q reserved 29 2 reserved 4 reserved 31 6 reserved 1024QAM modulation is additionally employed in the present disclosure. For modulation, a 10-tuplet of bits b(i), b(i+1), b(i+2), b(i+3), b(i+4), b(i+5), b(i+6), b(i+7), b(i+8), b(i+9) are mapped into a complex-valued modulation symbol x, which follows x _______________ 1 1(1¨ 2b(z))[16 ¨ (1¨ 2b (7 + 2))[8 ¨ (1¨ 2b (1 + 4) )[4 ¨
(1¨ 2b(i+ 6))[2 ¨ (1¨ 2b (1 + 8) )11 +j(1¨ 2b(1 + 1))[16_ (1¨ 2b(z + 3))[8 ¨(1¨ 2b(i + 5))[4¨ (1¨ 2b(/ + 7))[2 ¨
(1¨ 2b(i + 9))1111}
=
In the prior art, a variety of APSK constellations have been proposed, while the MCS index table is designed based on RAPSK constellations in the present disclosure.
RAPSK constellation is closely related to Gray mapped amplitude phase shift keying (Gray-APSK) constellation. Gray-APSK constellation is characterized by:
(1) All the constellation points fall on Na(Na > 1) concentric rings and Na =
ra represents a power of 2, where Na denotes the number of rings and ma is a positive integer, which denotes the number of bits for amplitude mapping.
(2) The radius of the i-th ring i; follows i+os r= = 1-ln ¨ ¨Na ,.= 0,1,2... Na ¨ 1, where 1'0 is the minimum radius.
(3) The constellation points on the same ring are equally spaced, that is, the phase differences between each pair of adjacent constellation points are constant. The number of constellation points on each ring is identical and equals a power of 2, i.e., no = = = nNa-1 = Np = 2mP where Np denotes the number of points per ring, or the different number of phases on the concentric ring; and mp is a positive integer, which depicts the number of bits for phase mapping.
(4) The constellation points on all rings have a common phase offset, i.e., 90 = 191 = = eNa-1 = 0*, where 0* is an arbitrary constant real number.
(5) There is a one-to-one mapping between 2 Qm constellation points of Gray-APSK and Qm-tuples of bits, which is called Gray-APSK modulation mapping, where Qm=ma+mp.
Gray-APSK
modulation mapping satisfies gray mapping in which:
0 The modulation mapping of any two adjacent constellation points on the same ring differs by one bit, i.e., the Hamming distance is 1.
0 The modulation mapping of any two adjacent constellation points in the same phase differs by one bit, i.e., the Hamming distance is 1.
RAPSK constellation is characterized by:
(1) Satisfying the characteristics of items (1), (3) and (4) of Gray-APSK
constellation.
(2) The radius of the i-th ring 7; is = ro + i = D , where i=0,1,2, Na-1 where ro is a real number greater than 0 and less than 1; D > 0 is the radius difference between adjacent rings, i,e., the inter-ring distance between adjacent rings, and D is a function of the minimum radius rc, and the number of rings, Na, for example, D =
3 ro i 1 + 2 (1-r6)(2 =Na-1) 1 ).
(2Na-1) ( A 3rg (Na-1) (3) Natural mapping is employed for the modulation mapping of Qm=ma+mp bits of constellation points, that is, for constellation point ri = exp j =
+ 611 ), the bit mapping is a concatenation of binary representations of ma bits and mp bits of integers i and k. As an example, ma = 2, mp = 4, i = 3 and k = 10, then (i) The modulation mapping can be "111010", where the first two bits "11" are binary representations of i=3 and the last four bits "1010" are binary representations of k=10.
(ii) The modulation mapping can be "101011", where the first four bits "1010"
are binary representations of k=10 and the last two bits "11" are binary representations of i=3.
(iii) The modulation mapping can also be "101110", where the 1st, 2nd, 4th and 6th bits "1010" are binary representations of k=10, and the 3rd and 5th bits "11" are binary representations of i=3.
FIG. 1 depicts a schematic diagram showing a RAPSK modulation constellation in the prior art. As shown in FIG. 1, this constellation is a schematic diagram of a RAPSK
modulation constellation with modulation order Qm = 6, Na (number of rings) = 4, number of points per concentric ring Np = 16 (i.e., number of bits for amplitude mapping, ma = 2, number of bits for phase mapping, mp = Qm-ma = 4) and phase offset 6r , where ro is the minimum radius of the constellation, inter-ring distance is D, and natural mapping is employed. FIG.
1 depicts a schematic diagram of RAPSK modulation with modulation order Qm = 6 by means of natural modulation mapping, and the black dots in FIG. 1 are constellation points.
In the present disclosure, RAPSK constellation is incorporated with Gray mapping to achieve RAPSK with Gray mapping. Through the joint design of bit mapping and bit interleaving, the signal-to-noise ratio required to achieve the same block error rate is reduced. On this basis, MCS
index table based on RAPSK modulation is designed.
FIG. 2 depicts a flowchart showing a method for data transmission according to an embodiment of the present disclosure. The method according to this embodiment can be performed by a device for data transmission. The device for data transmission may be a first communication node. In an example, the first communication node is a base station. As shown in FIG. 2, the method according to this embodiment includes operation S210.
At S210, an MCS index value is sent to a second communication node.
The MCS index value is indicative of one group of parameters in an MCS index table. The modulation corresponding to at least one group of parameters in the MCS index table is RAPSK
modulation.
In an embodiment, the second communication node refers to the terminal device side, for example, the second communication node can be a user equipment. In an embodiment, the first communication node modulates a transport block and sends the modulated transport block and the MCS index value of the transport block to the second communication node. The MCS index value is indicative of a set of parameters in the MCS index table, and the MCS index table contains at least one set of parameters corresponding to RAPSK modulation.
In an embodiment, the MCS index table includes at least one of, MCS index values;
modulation order; target code rate; spectrum efficiency; number of concentric rings; number of constellation points on each concentric ring or different modulation phases on each concentric ring;
number of bits for amplitude mapping; number of bits for phase mapping;
minimum radius; inter-ring distance; or RAPSK modulation mapping scheme. In an embodiment, the MCS
index table includes a plurality column of parameters, and each column of parameters can be at least one of, MCS index values; modulation order; target code rate; spectrum efficiency;
number of concentric rings; number of constellation points on each concentric ring or different modulation phases on each concentric ring; number bits for amplitude mapping ; number of bits for phase mapping;

minimum radius; inter-ring distance; or RAPSK modulation mapping scheme. In an embodiment, an MCS index value indicates one set of parameters in the MCS index table, which means that the MCS index value indicates one row of parameters in the MCS index table, and each row of parameters in the MCS index table may include at least one of, MCS index values; modulation order; target code rate; spectrum efficiency; number of concentric rings;
number of constellation points on each concentric ring or different modulation phases on each concentric ring; number of bits for amplitude mapping; number of bits for phase mapping; minimum radius;
inter-ring distance; or RAPSK modulation mapping scheme.
In an embodiment, the modulation scheme corresponding to at least one MCS
index value in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, the modulation order of the QAM
modulation is the maximum modulation order in the MCS index table.
In an embodiment, the modulation scheme corresponding to the maximum spectral efficiency in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, when the modulation order is "4", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 1.3 and less than 3.1.
In an embodiment, in the MCS index table, when the modulation order is "6", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 2.5 and less than 5.2.
In an embodiment, in the MCS index table, when the modulation order is "8", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 4.5 and less than 7.1.
In an embodiment, in the MCS index table, when the modulation order is "10", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 6.5 and less than 9.3.
In an embodiment, the RAPSK modulation includes RAPSK with Gray mapping.
FIG. 3 depicts a flowchart showing a method for data transmission according to another embodiment of the present disclosure. The method according to this embodiment can be performed by a device for data transmission. The device for data transmission may be a second communication node. In an example, the second communication node is a terminal device (e.g., a user equipment).
As shown in FIG. 3, the method according to this embodiment includes operation S310.
At S310, an MCS index value sent by a first communication node is received.

The MCS index value is indicative of one group of parameters in an MCS index table. The modulation scheme corresponding to at least one group of parameters in the MCS
index table is RAPSK modulation.
In an embodiment, the MCS index table includes at least one of, MCS index values;
modulation order; target code rate; spectrum efficiency; number of concentric rings; number of constellation points on each concentric ring or different modulation phases on each concentric ring;
number of bits for amplitude mapping; number of bits for phase mapping;
minimum radius; inter-ring distance; or RAPSK modulation mapping scheme.
In an embodiment, the modulation scheme corresponding to at least one MCS
index value in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, the modulation order of the QAM
modulation is the maximum modulation order in the MCS index table.
In an embodiment, the modulation scheme corresponding to the maximum spectral efficiency in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, when the modulation order is "4", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 1.3 and less than 3.1.
In an embodiment, in the MCS index table, when the modulation order is "6", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 2.5 and less than 5.2.
In an embodiment, in the MCS index table, when the modulation order is "8", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 4.5 and less than 7.1.
In an embodiment, in the MCS index table, when the modulation order is "10", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 6.5 and less than 9.3.
In an embodiment, the RAPSK modulation includes RAPSK with Gray mapping.
Embodiment One discusses a case where the first communication node is a base station, the second communication node is a terminal device, and the base station is transmitting a transport block to the terminal device by way of example to illustrate the data transmission process. In an embodiment, the base station sends a transport block to the terminal device, which can be understood as that the base station modulates the transport block and sends the modulated transport block to the terminal device. The base station sends the transport block along with the MCS index value to the terminal device.
In an embodiment, the first communication node sends the modulated transport block and the MCS index value of the transport block to the second communication node.
The MCS index value is indicative of a set of parameters in the MCS index table having therein at least one set of parameters whose modulation scheme corresponds to RAPSK modulation.
In an embodiment, the first communication node obtains a bit sequence fo, A =
==,h_i after performing at least one of the following operations on a transport block, channel coding, rate matching, bit interleaving, code block concatenation, or scrambling.
The first communication node maps the bit sequence fo, f2 , h to a complex symbol sequence xo, x, , x2, = ==, xQõ, according to a modulation scheme corresponding to the MCS index value, and sends the mapped sequence to the second communication node, where E
is a positive integer, which denotes the length of the bit sequence Jo, fi,f2 , and Qm is the modulation order of the modulation scheme corresponding to the MCS index value.
The first communication node sends in the downlink control information, the MCS index value of the transport block to the second communication node. The MCS index value is an index value in the MCS index table, which is indicative of a set of parameters for modulation and coding scheme of the transport block, and the MCS index table has at least one MCS
index value corresponding to RAPSK modulation.
A set of parameters in the MCS index table includes at least one of, MCS index value;
modulation order Qm; target code rate R, or R multiplied by a constant K, where K is a positive number; spectral efficiency; modulation scheme; number of concentric rings Na;
number of points per ring, or number of different phases on each concentric ring, Np; number of bits for amplitude mapping, ma; number of bits for phase mapping, mp; minimum radius r0; inter-ring distance or radii differences of adjacent concentric rings, D; or RAPSK modulation mapping scheme.
Embodiment Two discusses a case where the first communication node is a base station, the second communication node is a terminal device, and the terminal device is receiving a transport block from the base station by way of example to illustrate the data transmission process. In an embodiment, the base station modulates the transport block and sends the modulated transport block to the terminal device. The base station sends the transport block along with the MCS index value to the terminal device.
In an embodiment, the second communication node receives the modulated transport block and the MCS index value of the transport block sent by the first communication node.
The MCS index value is indicative of a set of parameters in the MCS index table, and the MCS index table contains at least one set of parameters corresponding to RAPSK
modulation.
In this embodiment, the MCS index value received by the second communication node is the index value in the MCS index table, which is indicative of the modulation coding scheme of the transport block received by the second communication node, and at least one MCS index value in the MCS index table corresponds to RAPSK modulation.
A set of parameters in the MCS index table includes at least one of, MCS index value;
modulation order Qm; target code rate R, or R multiplied by a constant K, where K is a positive number; spectral efficiency; modulation scheme; number of concentric rings Na;
number of points per ring, or number of different phases on a concentric ring, Np; number of bits for amplitude mapping, ma; number of bits for phase mapping, mp; minimum radius r0; inter-ring distance or radii differences of adjacent concentric rings, D; or RAPSK modulation mapping scheme.
Embodiment Three discusses a case where the first communication node is a base station, the second communication node is a terminal device, and the terminal device is transmitting a transport block to the base station by way of example to illustrate the data transmission process. In an embodiment, the terminal device transmits the transport block to the base station, which can be understood as that the terminal device modulates the transport block and sends the modulated transport block to the base station.
In an embodiment, the second communication node receives the MCS index value sent by the first communication node and sends the modulated transport block to the first communication node. The MCS index value is indicative of a set of parameters in the MCS
index table, and the MCS index table contains at least one set of parameters corresponding to RAPSK
modulation.
In this embodiment, the second communication node performs at least one of the following operations on the transport block to obtain a bit sequence f f f J, ¨ 2 = fE-1: channel coding, rate matching, bit interleaving; code block concatenation, or scrambling.
The second communication node maps the bit sequence fo, fp f2 = fE_I to a complex symbol sequence xo, x], x2, ..., xmon4 according to a modulation scheme corresponding to the MCS
index value, and sends the mapped sequence to the first communication node, where E is a positive integer, which denotes the length of the bit sequence fo, fi, f2 = = ., f,õ
and Qm is the modulation order of the modulation scheme corresponding to the MCS index value.
The second communication node receives the MCS index value of the transport block sent by the first communication node in the downlink control information, where the MCS index value is an index value in the MCS index table, which is indicative of a set of parameters in the MCS
index table, and at least one MCS index value in the MCS index table corresponds to RAPSK
modulation.
A set of parameters in the MCS index table includes at least one of, MCS index value;
modulation order Qm; target code rate R, or R multiplied by a constant K, where K is a positive number; spectral efficiency; modulation scheme; number of concentric rings Na;
number of points per ring, or number of different phases per concentric ring, Np; number of bits for amplitude mapping, ma; number of bits for phase mapping, mp; minimum radius ro ; inter-ring distance or radii differences of adjacent concentric rings, D; or RAPSK modulation mapping scheme.
Embodiment Four discusses a case where the first communication node is a base station, the second communication node is a terminal device, and the base station is receiving a transport block sent by the terminal device by way of example to illustrate the data transmission process. In an embodiment, the base station receives the transport block sent by the terminal device, which can be understood as that the terminal device modulates the transport block and sends the modulated transport block to the base station.
In an embodiment, a first communication node sends an MCS index value to a second communication node and receives a modulated transport block sent by the second communication node. The MCS index value is indicative of a set of parameters in the MCS
index table, and the MCS index table contains at least one set of parameters corresponding to RAPSK
modulation.
In this embodiment, the first communication node sends in the downlink control information, the MCS index value of the transport block to the second communication node.
The second communication node performs at least one of the following operations on the transport block to obtain a bit sequence f0,f,f2- --, f E_i: channel coding, rate matching, bit interleaving; code block concatenation, or scrambling.

The second communication node maps the bit sequence fo,1,12...,f,, to a complex symbol sequence xo, xi, x2, ..., xE/Qm_i according to a modulation scheme corresponding to the MCS
index value, and sends the mapped sequence to the first communication node, where E is a positive integer, which denotes the length of the bit sequence 10, fl,f2*-,fE-1, and Qm is the modulation order of the modulation scheme corresponding to the MCS index value.
The MCS index value is an index value in the MCS index table, which is indicative of a set of parameters for modulation and coding scheme of the transport block, and the MCS index table has at least one MCS index value corresponding to RAPSK modulation.
A set of parameters in the MCS index table includes at least one of, modulation order Qm;
target code rate R, or R multiplied by a constant K, where K is a positive number; spectral efficiency; modulation scheme; number of concentric rings Na; number of points per ring, or number of different phases on a concentric ring, Np; number of bits for amplitude mapping, ma;
number of bits for phase mapping, mp; minimum radius ro ; inter-ring distance or radii differences of adjacent concentric rings, D; or RAPSK modulation mapping scheme.
Embodiment Five discusses a case where an MCS index table includes both RAPSK
modulation scheme and QAM modulation scheme, and illustrates the design of MCS
index table for RAPSK constellation.
This embodiment further illustrates the characteristics of MCS index table on the basis of any of the above embodiments. The difference between this embodiment and any of the above embodiment is that the MCS index table further has one of the following three characteristics.
In the MCS index table, at least one MCS index value is indicative of the QAM
modulation.
In the MCS index table, the modulation order Qm of QAM modulation is always the largest one throughout the MCS index table.
The modulation scheme corresponding to the maximum spectral efficiency in MCS
index table is the QAM modulation.
Embodiment Six discusses the relationship between the modulation order and the spectral efficiency interval of RAPSK modulation in the MCS index table. This embodiment further illustrates the characteristics of MCS index table on the basis of any of the above embodiments.
The difference between this embodiment and any of the above embodiment is that the MCS

index table further has the following characteristics.
In the MCS index table, when the modulation order Qm = 4, the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 1.3 and less than 3.1.
In the MCS index table, when the modulation order Qm = 6, the spectral efficiency corresponding to RAPSK modulation scheme is greater than 2.5 and less than 5.2.
In the MCS index table, when the modulation order Qm = 8, the spectrum efficiency corresponding to the modulation order Qm = 8 and RAPSK modulation scheme is greater than 4.5 and less than 7.1.
In the MCS index table, when the modulation order Qm = 10, the spectral efficiency corresponding to RAPSK modulation scheme is greater than 6.5 and less than 9.3.
Embodiment Seven further illustrates the characteristics of RAPSK modulation scheme on the basis of any of the above embodiments. FIG. 4 depicts a schematic diagram showing a RAPSK
modulation constellation according to an embodiment of the present disclosure.
In this embodiment, the RAPSK modulation constellation as shown in FIG. 4 is taken as an example to illustrate RAPSK modulation.
The differences between this embodiment and any of the above embodiment lie in that, RAPSK modulation in this embodiment is a complex set of 2Q- elements with at least one of the following characteristics (where Qõ, denotes the modulation order of RAPSK
modulation, the complex set is also called constellation, and the elements in the complex set are called constellation points):
(1) All constellation points fall on Na = 2' concentric rings and the radius of the i-th ring ri = ro + i=D, i = 0, 1, ..., Na-1; where ma is the number of bits for amplitude mapping, ro is the radius of the 0th ring, i.e., the minimum radius, and D is the inter-ring distance. The minimum radius ro and the inter-ring distance D are both real numbers within the interval [0, 1].
(2) There are NP= 2mP points on each ring, and the constellation points on the same ring are equidistant, that is, the phase difference between two adjacent constellation points is 27( ¨ =
where Npdenotes number of RAPSK modulation phases, mP is the number of bits Np for phase phase mapping . mP is a function of modulation order Qm and the number of bits for amplitude mapping ma .
(3) The constellation points on all concentric rings have a common phase offset8*, where e* is real numbers, that is, the phases of the constellation points modulated by RAPSK are always taken from the set f-2n = k + k = 0,1,2, = = = ,Np-2,Np-1}.
Np (4) The RAPSK modulated symbol is a function of at least one of the following parameters:
minimum radius ro ; inter-ring distance D; modulation order Qõ, ; number of bits for amplitude mapping ma ; number of bits for phase mapping mP ; number of concentric rings for RAPSK modulation Na ; number of phase for RAPSK modulation N; or phase shift 8*.
(5) The RAPSK modulated symbol is within the following complex set:
(ro + i = D) = exp (j = (iI2p = k + 01)1i = 0,1, = = = ,Na ¨ 1; k = 0,1, = = =
,Np ¨ , where j = -\/i is the imaginary unit.
Alternatively, the complex set can also be expressed as:
1 (ro + i = D) = [cos (1,12p = k + Er) + j = sin (1,12p = k + 0111i = 0,1, ==
= ,Na ¨ 1; k = 0,1, === ,Np ¨ 1}, where j = -\/i is the imaginary unit.
(6) RAPSK modulation includes a one-to-one mapping from Qõ, bits, bo, bp b2.¨ -1 to 2Q. complex numbers, which is called the modulation mapping of RAPSK
modulation. In this embodiment, the modulation mapping of RAPSK modulation is Gray mapping, in which, ma bits of the Qõ, bits, are utilized to determine the radii of the concentric ring for the constellation points (i.e., the amplitudes of the constellation points), and the other mp bits of the Qõ, bits are utilized to determine the phases of the constellation points. Therefore, ma is called the number of bits for amplitude mapping and mP is called the number of bits for phase mapping. Shown in FIG. 4 is an example of Gray mapping for RAPSK modulation, in which the number adjacent to each dot in FIG. 4 is obtained by its corresponding Qõ, bits bo, bp b2 ===, b1 according to the equation Qm-1 22m-1-1 = k.
i=0 (7) The number bits for amplitude mapping ma is a function of the modulation order Q. .
The relationship between the number of bits for amplitude mapping and the modulation order is ma = Q1112 ¨1= In particular, in the case of modulation order Qui = 4, the number of bits for amplitude mapping ma = 1. In the case of modulation order Qõ, = 6, the number of bits for ma amplitude mapping = 2. In the case of modulation order Qõ, = 8, the number of bits for amplitude mapping ma = 3. In the case of modulation order Qõ, = 10, the number of bits for amplitude mapping ma = 4.
(8) The relationship between the number of bits for phase mapping mp and the modulation order Q,õ and the number of bits for amplitude mapping ma can be mp = Qõ,¨ ma.
(9) The number bits for phase mapping mp is a function of the modulation order Qõ, . The relationship between the number of bits for phase mapping and the modulation order Qõ, can be mp = QõI2 +1 . In particular, in the case of modulation order Qõ,= 4, the number of bits for phase mapping mp = 3. In the case of modulation order Qõ, = 6, the number of bits for phase mapping mp =4. In the case of modulation order Qõ, = 8, the number of bits for phase mapping mp = 5. In the case of modulation order Qõ, = 10, the number of bits for phase mapping mp = 6.
(10) The inter-ring distance D is a function of the minimum radius ro and the number of concentric rings Na in the constellation, and the relationship among them can be 3r ( 1+ 2(1- ro2)(2. Na -1) D = 0 ___________________ -1 (2Na-1) 3r02 (Na -1) (11) The value range of the minimum radius is a function of the modulation order Qõ,, ro and the relationship between them is as follows: 0.5 < ro <0.7 in the case of Qõ,= 4; 0.3 <ro< 0.5 in the case of Q,,,= 6; 0.2 < ro< 0.4 in the case of Qõ,= 8; and 0.1 < ro <
0.3 in the case of Q,,,=
10.
(12) The value range of the inter-ring distance D is a function of the modulation order an , and the relationship between them is as follows: 0.52 <D <0.83 in the case of an = 4; 0.29 < D

<0.40 in the case of Q. = 6; 0.15 <D < 0.20 in the case of Q. = 8; and 0.08 <D
<0.11 in the case of Qm = 10.
FIG. 5 depicts a schematic diagram showing the gap between the bit-level mutual information of RAPSK modulation, QPSK modulation and QAM modulation with different modulation orders and the Shannon limit. As shown in FIG. 5, the gap between the bit-level mutual information of RAPSK modulation with Gray mapping, QPSK modulation and QAM
modulation with different modulation orders and Shannon limit is given. As can be seen from FIG. 5, for RAPSK modulation with modulation order Qm , the distance between RAPSK
modulation and Shannon limit is significantly smaller than that of the distance between QAM
modulation and Shannon limit when the spectral efficiency is less than Qm -1.5, that is, the performance of the RAPSK is better.
In order to obtain greater shaping gain, the increase in spectral efficiency requires the increase in the modulation order of RAPSK modulation. Therefore, a spectral efficiency range is configured for different modulation orders in the MCS index table.
Meanwhile, for a given the spectral efficiency, different types of modulation and modulation order shall be selected to achieve better performance. The following embodiments discuss several examples of MCS index table obtained by appropriate selection for modulation and parameters thereof according to spectral efficiency.
Embodiment Eight provides Table 6 which is an MCS index table according to an embodiment of the present disclosure. Shown in Table 6 is an example MCS index table with the highest modulation order Qn, = 8, QPSK and RAPSK combined and no reserved item.
This embodiment provides an example MCS index table based on any one of the Embodiments One to Four, Six and Seven. As shown in Table 6, the MCS index table is characterized by the following. First, in the MCS index table, the modulation order Qm corresponding to the highest spectral efficiency is 8. Second, in the MCS
index table, the modulation order corresponding to RAPSK modulation scheme is Qm > 2. Third, in the MCS index table, at least one set of parameters indicated by an MCS index value includes the following parameters: MCS index value, modulation order Qõ, , minimum radius ro , target coding rate R or R multiplied by a constant K (where K is a positive number), and spectrum efficiency. Fourth, in the MCS index table, the modulation scheme corresponding to the lowest spectral efficiency is QPSK modulation with the modulation order an is 2.
Table 6 An MCS index table Modulation MCS Minimum Target code Rate R x Spectral Order IndexImcs Q Radius ro [1024]
efficiency .

0.2344 0.3066 0.3770 0.4902 0.6016 2 - 379 0.7402 0.8770 1.0273 1.1758 1.3262 4 0.66 340 1.3281 11 4 0.60 378 1.4766 12 4 0.56 434 1.6953 13 4 0.54 490 1.9141 14 4 0.54 553 2.1602 4 0.55 616 2.4063 16 4 0.55 657 2.5664 17 4 0.56 699 2.7305 18 6 0.31 466 2.7305 19 6 0.32 517 3.0293 6 0.32 567 3.3223 21 6 0.33 616 3.6094 22 6 0.34 666 3.9023 23 6 0.35 719 4.2129 24 6 0.36 772 4.5234 8 0.22 616.5 4.8164 26 8 0.23 654.5 5.1133 27 8 0.23 682.5 5.3320 28 8 0.23 711 5.5547 29 8 0.23 754 5.8906 8 0.24 797 6.2266 31 8 0.25 841 6.5703 Embodiment Nine provides Table 7 which is another MCS index table according to an embodiment of the present disclosure. Shown in Table 7 is an example MCS index table with the highest modulation order Q. = 8, QPSK and RAPSK combined and reserved items.
This embodiment provides an example of MCS index table on the basis of any of the Embodiments One to Four, Six and Seven discussed above. As shown in Table 7, the differences between the MCS index table shown in Table 7 and the MCS index table shown in Table 6 lie in the following.
In the MCS index table, the MCS index value corresponding to the "reserved"
item indicates the modulation scheme in the following manner.
First, the modulation scheme indicated by MCS index value of "reserved" item of modulation order an = 2 is the QPSK modulation.
Second, the modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an = 4 is the RAPSK modulation with the minimum radius of al, where al is constant which follows 0.5 < al < 0.7.
Third, the modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an = 6 is the RAPSK modulation with the minimum radius of a2, where a2 is constant which follows 0.3 < a2 < 0.5.
Fourth, the modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an = 8 is the RAPSK modulation with the minimum radius of a3, where a3 is constant which follows 0.2 < a3 < 0.4.
Table 7 Another MCS Index Table MCS
Spectral Modulation Minimum Target code Rate R x Index efficiency Order Q. Radius ro [1024]
Imcs 0.2344 0.3066 0.3770 0.4902 0.6016 0.7402 0.8770 1.0273 1.1758 1.3262 4 0.66 340 1.3281 11 4 0.60 378 1.4766 12 4 0.56 434 1.6953 13 4 0.54 490 1.9141 14 4 0.54 553 2.1602 4 0.55 616 2.4063 16 4 0.55 657 2.5664 17 6 0.31 466 2.7305 18 6 0.32 517 3.0293 19 6 0.32 567 3.3223 6 0.33 616 3.6094 21 6 0.34 666 3.9023 22 6 0.35 719 4.2129 23 6 0.36 772 4.5234 24 8 0.22 616.5 4.8164 8 0.23 654.5 5.1133 26 8 0.23 682.5 5.3320 27 8 0.23 711 5.5547 28 2 reserved 29 4 al reserved 6 a2 reserved 31 8 a3 reserved Embodiment 10 provides Table 8 which is another MCS index table according to an embodiment of the present disclosure. Shown in Table 8 is an example MCS index table with the highest modulation order an= 10, QPSK and RAPSK combined and reserved items.
5 This embodiment provides an example of MCS index table on the basis of any of the Embodiments One to Four, Six and Seven discussed above. As shown in Table 8, the differences between the MCS index table shown in Table 8 and the MCS index table shown in Table 7 lie in the following.
First, in the MCS index table, the modulation order an corresponding to the highest spectral 10 efficiency is 10.
Second, in the MCS index table, at least one set of parameters indicated by MCS index value includes the following parameters: MCS index value; modulation order an ;
inter-ring distance or radii differences of adjacent concentric rings, D; target coding rate R, or R
multiplied by a constant K, where K is a positive number; and spectral efficiency.
Third, in the MCS index table, the MCS index value corresponding to the "reserved" item indicates the modulation scheme in the following manner.
1) The modulation scheme indicated by the MCS index value of "reserved" item of modulation order Qm = 2 is QPSK modulation.
2) The modulation scheme indicated by MCS index value of "reserved" item with modulation order an = 4 is RAPSK modulation with the inter-ring distance of D1, where D1 is constant, which follows 0.52 < D1 <0.83.
3) The modulation scheme indicated by MCS index value of "reserved" item with modulation order an = 6 is RAPSK modulation with the inter-ring distance of D2, where D2 is constant, which follows 0.29 <D2 <0.40.
4) The modulation scheme indicated by MCS index value of "reserved" item with modulation order an = 8 is RAPSK modulation with the inter-ring distance of D3, where D3 is constant, which follows 0.15 <D3 <0.20.
5) The modulation scheme indicated by MCS index value of "reserved" item with modulation order an = 10 is RAPSK modulation with the inter-ring distance of D4, where D4 is constant, which follows 0.08 <D4 < 0.11.
Table 8 Another MCS Index Table MCS Modulation Spectral Inter-Ring Target code Rate R x . .
Index Order efficiency Distance D [1024]
'ma Qm 0.2344 0.3770 0.6016 0.8770 1.1758 5 4 0.6806 378 1.4766 6 4 0.7386 434 1.6953 7 4 0.7671 490 1.9141 8 4 0.7671 553 2.1602 9 4 0.7529 616 2.4063 10 4 0.7386 699 2.7305 11 6 0.3875 517 3.0293 12 6 0.3875 567 3.3223 13 6 0.3826 616 3.6094 14 6 0.3777 666 3.9023 15 6 0.3727 719 4.2129 16 6 0.3677 772 4.5234 17 8 0.1933 616.5 4.8164 18 8 0.1911 654.5 5.1133 19 8 0.1911 682.5 5.3320 20 8 0.1911 711 5.5547 21 8 0.1911 754 5.8906 22 8 0.1890 797 6.2266 23 8 0.1868 841 6.5703 24 10 0.0977 708 6.9141 25 10 0.0977 733 7.1582 26 10 0.0967 758.5 7.4072 27 2 reserved 28 4 D1 reserved 29 6 D2 reserved 30 8 D3 reserved 31 10 D4 reserved Embodiment Eleven provides Table 9 which is another MCS index table according to an embodiment of the present disclosure. Shown in Table 9 is an example MCS index table with the highest modulation order an= 6, n/2-BPSK, QPSK and RAPSK combined, and reserved items.
This embodiment provides an example of MCS index table on the basis of any of the Embodiments One to Four, Six and Seven discussed above. As shown in Table 9, the differences between the MCS index table shown in Table 9 and the MCS index table shown in Table 7 lie in the following.
First, in the MCS index table, the modulation order an corresponding to the highest spectral efficiency is 6.
Second, in the MCS index table, at least one set of parameters indicated by MCS index value includes the following parameters: MCS index value; modulation order gn;
minimum radius ro , inter-ring distance or radii differences of adjacent concentric rings, D;
target coding rate R, or R
multiplied by a constant K, where K is a positive number; and spectral efficiency.
Third, value q of the modulation order an indicated by some MCS index values in the MCS

index table can be either 1 or 2.
Fourth, the modulation scheme indicated by MCS index value with modulation order an=
1 is n/2-BPSK modulation.
Fifth, the modulation scheme indicated by MCS index value with modulation order an= 2 is QPSK modulation.
Sixth, in the MCS index table, the MCS index value corresponding to the "reserved" item indicates the modulation scheme in the following manner.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order Qm = 1 is n/2-BPSK modulation.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order an = 2 is QPSK modulation.
The modulation scheme indicated by MCS index value of "reserved" item with modulation order an = 4 is RAPSK modulation with the minimum radius al, and inter-ring distance of D1, where al and D1 are constants, which follow 0.5 < al < 0.7, and 0.52 < D1 <0.83.
The modulation scheme indicated by MCS index value of "reserved" item with modulation order an= 6 is RAPSK modulation with the minimum radius a2, and inter-ring distance of D2, where a2 and D2 are constants, which follow 0.3 < a2 < 0.5, and 0.29 < D2 <0.40.
Table 9 Another MCS Index Table Target code MCS Modulati Inter-ring Minimum Rate R x Spectral Index on Order Distance Radius ro 1024 efficiency imcs Q. D
0 q - - 60/q 0.0586 1 q - - 80/q 0.0781 2 q - - 100/q 0.0977 3 q - - 128/q 0.1250 4 q - - 156/q 0.1523 5 q - - 198/q 0.1934 0.2344 0.3066 0.3770 0.4902 0.6016 0.7402 0.8770 1.0273 1.1758 1.3262 16 4 0.60 0.6806 378 1.4766 17 4 0.56 0.7386 434 1.6953 18 4 0.54 0.7671 490 1.9141 19 4 0.54 0.7671 553 2.1602 20 4 0.55 0.7529 616 2.4063 21 4 0.55 0.7529 658 2.5703 22 4 0.56 0.7386 699 2.7305 23 6 0.32 0.3875 517 3.0293 24 6 0.32 0.3875 567 3.3223 25 6 0.33 0.3826 616 3.6094 26 6 0.34 0.3777 666 3.9023 27 6 0.36 0.3727 772 4.5234 28 q reserved 29 2 - reserved 30 4 al D1 reserved 31 6 a2 D2 reserved Embodiment Twelve discusses Table 10, which is another MCS index table according to an embodiment of the present disclosure. As shown in Table 10, this MCS index table is an example of an MCS index table in which the highest modulation order an =6, with QPSK, RAPSK and QAM combined, and reserved items.
This embodiment provides an example of MCS index table on the basis of any of the embodiments one to seven discussed above. As shown in Table 10, the differences between the MCS index table shown in Table 10 and the MCS index table shown in Table 9 lie in the following.
First, in the MCS index table, three MCS index values with modulation order an = 6, i.e., MCS index values 27, 28 and 31, indicate QAM modulation.
Second, the modulation scheme indicated by MCS index value 28 with the highest spectral efficiency is QAM modulation.
Third, MCS index values 27, 28 and 31 indicate modulation order an = 6 for QAM

modulation, which is the largest modulation order throughout the MCS index table.
Fourth, in the MCS index table, at least one set of parameters indicated by MCS index value
32 includes the following parameters: MCS index value; modulation order an ;
number of concentric rings, Na; minimum radius ,j; target coding rate R, or R multiplied by a constant K, where K is a positive number; and spectrum efficiency.
Fifth, in the MCS index table, the MCS index value corresponding to the "reserved" item indicates the modulation scheme in the following manner.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order an= 2 is QPSK modulation.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an= 4 is the RAPSK modulation with number of concentric rings, Na =2, and minimum radius of al, where al is constant which follows 0.5 < al < 0.7.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order an= 6 is QAM modulation.
Table 10 Another MCS Index Table MCS Modulation Spectral Number of Minimum Target code Rate R
Index Order efficiency Rings Na Radius ro x [1024]
Imcs Qm 0 2 - - 120 0.2344 1 2 - - 157 0.3066 2 2 - - 193 0.3770 3 2 - - 251 0.4902 4 2 - - 308 0.6016 5 2 - - 379 0.7402 6 2 449 0.8770 7 2 - - 526 1.0273 8 2 - - 602 1.1758 9 2 - 679 1.3262 10 4 2 0.66 340 1.3281 11 4 2 0.60 378 1.4766 12 4 2 0.56 434 1.6953 13 4 2 0.54 490 1.9141 14 4 2 0.54 553 2.1602 15 4 2 0.55 616 2.4063 16 4 2 0.56 658 2.5703 17 6 4 0.32 438 2.5664 18 6 4 0.31 466 2.7305 19 6 4 0.32 517 3.0293
33 20 6 4 0.32 567 3.3223 21 6 4 0.33 616 3.6094 22 6 4 0.34 666 3.9023 23 6 4 0.35 719 4.2129 24 6 4 0.36 772 4.5234 25 6 4 0.37 822 4.8164 26 6 4 0.40 873 5.1152 5.3320 5.5547 29 2 reserved 30 4 2 al reserved 31 6 reserved Embodiment Thirteen discusses Table 11, which is another MCS index table according to an embodiment of the present disclosure. As shown in Table 11, this MCS index table is an example of an MCS index table in which the highest modulation order Q. =10, with QPSK, RAPSK and QAM combined, and reserved items.
This embodiment provides an example of MCS index table on the basis of any of the embodiments one to seven discussed above. As shown in Table 11, the differences between the MCS index table shown in Table 11 and the MCS index table shown in Table 10 lie in the following.
First, in the MCS index table, the modulation order Qm corresponding to the highest spectral efficiency is 10.
Second, in the MCS index table, two MCS index values with modulation order Q.
= 10, i.e., MCS index values 26 and 31, indicate QAM modulation.
Third, the modulation scheme indicated by MCS index value 26 with the highest spectral efficiency is QAM modulation.
Fourth, MCS index values 26 and 31 indicate modulation order Q. = 10 for QAM
modulation, which is the largest modulation order throughout the MCS index table.
Fifth, in the MCS index table, at least one set of parameters indicated by MCS
index value includes the following parameters: MCS index value; modulation order Q. ;
number of points on each concentric ring, or different phase numbers on the concentric rings, Np;
minimum radius ro ;
target coding rate R, or R multiplied by a constant K, where K is a positive number; and spectral
34 efficiency.
Sixth, in the MCS index table, the MCS index value corresponding to the "reserved" item indicates the modulation scheme in the following manner.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order Q.= 2 is QPSK modulation.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order Q. = 4 is the RAPSK modulation with different number of phase on the concentric rings, Np=8, and minimum radius of al, where al is constant which follows 0.5 < al <
0.7.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order Q. = 6 is the RAPSK modulation with different number of phase on the concentric rings, Np=16, and minimum radius of a2, where a2 is constant which follows 0.3 < a2 <0.5.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order Q. = 8 is the RAPSK modulation with different number of phase on the concentric rings, Np=32, and minimum radius of a3, where a3 is constant which follows 0.2 < a3 <0.4.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order Q.= 10 is QAM modulation.
Table 11 Another MCS Index Table MCS Modulation Number of Target code Spectral Mi ni mum Index Order Phases Rate R x efficiency Radius ro hics Qm Np [1024]

0.2344 0.3770 0.6016 0.8770 1.1758 5 4 8 0.60 378 1.4766 6 4 8 0.54 490 1.9141 7 4 8 0.55 616 2.4063 8 4 8 0.56 699 2.7305 9 6 16 0.32 567 3.3223 6 16 0.34 666 3.9023 11 6 16 0.35 719 4.2129 12 6 16 0.36 772 4.5234 13 8 32 0.22 616.5 4.8164 14 8 32 0.23 654.5 5.1133 8 32 0.23 682.5 5.3320 16 8 32 0.23 711 5.5547 17 8 32 0.23 754 5.8906 18 8 32 0.24 797 6.2266 19 8 32 0.25 841 6.5703 10 64 0.16 708 6.9141 21 10 64 0.16 733 7.1582 22 10 64 0.17 758.5 7.4072 23 10 64 0.17 806 7.8711 24 10 64 0.19 853 8.3321 10 64 0.21 900.5 8.7939 9.2578 27 2 - reserved 28 4 8 al reserved 29 6 16 a2 reserved 8 32 a3 reserved 31 10 - reserved Embodiment Fourteen provides Table 12 which is another MCS index table according to an embodiment of the present disclosure. As shown in Table 12, this MCS index table is an example of an MCS index table in which the highest modulation order Q. =10, with QPSK, RAPSK and 5 QAM combined, and reserved items.
This embodiment provides an example of MCS index table on the basis of any of the embodiments one to seven discussed above. As shown in Table 12, the differences between the MCS index table shown in Table 12 and the MCS index table shown in Table 11 lie in the following.
First, in the MCS index table, at least one set of parameters indicated by MCS
index value 10 includes the following parameters: MCS index value; modulation order Qui ; number of bits for phase mapping, mp; minimum radius 'j; target coding rate R, or R multiplied by a constant K, where K is a positive number; and spectrum efficiency.
Second, in the MCS index table, the MCS index value corresponding to the "reserved" item indicates the modulation scheme in the following manner.

The modulation scheme indicated by MCS index value of "reserved" item of modulation order Q. = 2 is QPSK modulation.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an= 4 is the RAPSK modulation with number of bits for phase mapping, mp =3, and minimum radius of al, where al is constant which follows 0.5 < al <
0.7.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an= 6 is the RAPSK modulation with number of bits for phase mapping, mp =4, and minimum radius of a2, where a2 is constant which follows 0.3 < a2 <
0.5.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an= 8 is the RAPSK modulation with number of bits for phase mapping, mp =5, and minimum radius of a3, where a3 is constant which follows 0.2 < a3 <
0.4.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order an= 10 is QAM modulation.
Table 12 Another MCS Index Table number of bits Spectral MCS Modulation Target code .
.
for phase Minimum efficiency Index Order Rate R x mapping Radius ro /mcs Qm [1024]
mp 0.2344 0.3770 0.6016 0.8770 1.1758 5 4 3 0.60 378 1.4766 6 4 3 0.54 490 1.9141 7 4 3 0.55 616 2.4063 8 4 3 0.56 699 2.7305 9 6 4 0.32 567 3.3223 10 6 4 0.34 666 3.9023 11 6 4 0.35 719 4.2129 12 6 4 0.36 772 4.5234 13 8 5 0.22 616.5 4.8164 14 8 5 0.23 654.5 5.1133 8 5 0.23 682.5 5.3320 16 8 5 0.23 711 5.5547 17 8 5 0.23 754 5.8906 18 8 5 0.24 797 6.2266 19 8 5 0.25 841 6.5703 20 10 6 0.16 708 6.9141 21 10 6 0.16 733 7.1582 22 10 6 0.17 758.5 7.4072 23 10 6 0.17 806 7.8711 24 10 6 0.19 853 8.3321 25 10 6 0.21 900.5 8.7939 9.2578 27 2 - reserved 28 4 3 al reserved 29 6 4 a2 reserved 30 8 5 a3 reserved 31 10 - reserved In Embodiment Fifteen, the RAPSK modulation mapping scheme indicates the scheme in which every Q. successive bits of a bit sequence f0, f1, f2¨, f,,_,, i.e., [b0 , b,,b,...,be._,[ = [
fk on, fl+k Qm, f2+k On, ¨, fQm¨l+k Qm]( k = 0,1õ E/Qm -1) are mapped into a complex modulation symbol x = xk . The modulation map scheme can be one of limited and predefined schemes. For example, shown in Table 13 is a schematic table showing two different 4-bit modulation mapping schemes, which can correspond to some or all bit mapping in each modulation symbol in RAPSK
modulation. For another example, shown in Table 14 is a schematic table showing two different 6-bit modulation mapping schemes, which can correspond to some or all bit mappings in each modulation symbol in RAPSK modulation, where "i" in the table denotes the serial number of RAPSK modulation concentric rings and "k" denotes the serial number of the phase of RAPSK
modulation on the same ring.
In an embodiment, each of the predefined modulation mapping schemes can be expressed by an equation. In an example, the predefined modulation mapping scheme as shown in Table 13(a) can be expressed by the following equation:
x =(I.0 +b0 = (iI2 -ir,; -r0 )). exp(j = (Lc = [7 - (1- 2b, 44¨ (2b 2 - 1)[2 -(213, -1)]I1)j ; where ro is the minimum radius.
Table 15 depicts another MCS index table according to an embodiment of the present disclosure. Shown in Table 15 is an example MCS index table with the highest modulation order Qm =6, and QPSK and RAPSK combined.
This embodiment provides an example of MCS index table on the basis of any of the Embodiments One to Four, Six and Seven discussed above. As shown in Table 15, the differences between the MCS index table shown in Table 15 and the MCS index table shown in Table 9 lie in the following.
First, in the MCS index table, at least one set of parameters indicated by MCS
index value includes the following parameters: MCS index value; modulation order an;
minimum radius ro ; RAPSK modulation mapping scheme; target coding rate R, or R multiplied by a constant K, where K is a positive number; and spectral efficiency.
Second, in the MCS index table, the MCS index value corresponding to the "reserved" item indicates the modulation scheme in the following manner.
The modulation scheme indicated by MCS index value of "reserved" item of modulation order Qm =2 is QPSK modulation.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an= 4 is the RAPSK modulation with the minimum radius of al, and RAPSK
modulation mapping of Table 13(b), where al is constant which follows 0.5 < al < 0.7.
The modulation scheme indicated by the MCS index value of the "reserved" item with modulation order an= 6 is the RAPSK modulation with the minimum radius of a2, and RAPSK
modulation mapping of Table 14(b), where a2 is constant which follows 0.3 < a2 < 0.5.
Table 13 Schematic table showing two different 4-bit modulation mapping Phase (a) (b) Ring index = index bob ib2b3 bob ib2b3 Table 14 Schematic table showing two different 6-bit modulation mapping Ring Phase (a) (b) Ring Phase (a) (b) index index bob ib2b3b4b bob ib2b3b4 index index b0b1b2b3b4 bob ib2b3b4 i k 5 b5 i k b5 b5 Table 15 Another MCS Index Table MCS Modula Spectral Target Inde tion Minimum efficienc Modulation Mapping code Rate x Order Radius ro Y
Rx [1024]
/mcs Qm 0.0586 0.0781 0.0977 0.1250 0.1523 2 - - 99 0.1934 0.2344 0.3066 0.3770 0.4902 2 - - 308 0.6016 0.7402 0.8770 1.0273 1.1758 4 0.66 Table 13 (a) 340 1.3281 16 4 0.60 Table 13 (a) 378 1.4766 17 4 0.56 Table 13 (b) 434 1.6953 18 4 0.54 Table 13 (b) 490 1.9141 19 4 0.54 Table 13 (b) 553 2.1602 4 0.55 Table 13 (b) 616 2.4063 21 4 0.55 Table 13 (b) 438 2.5664 22 4 0.56 Table 13 (b) 699 2.7305 23 6 0.32 Table 14 (a) 517 3.0293 24 6 0.32 Table 14 (a) 567 3.3223 6 0.33 Table 14 (b) 616 3.6094 26 6 0.34 Table 14 (b) 666 3.9023 27 6 0.35 Table 14 (b) 719 4.2129 28 6 0.35 Table 14 (b) 772 4.5234 29 2 reserved 4 al Table 13 (b) reserved 31 6 a2 Table 14 (b) reserved FIG. 6 depicts a schematic block diagram showing a device for data transmission according to an embodiment of the present disclosure. This embodiment is directed to a device for data transmission. The device for data transmission is a first communication node.
As shown in FIG. 6, the device in this embodiment includes a transmitter 610.
The transmitter 610 is configured to transmit an MCS index value to the second communication node.
The MCS index value is indicative of one group of parameters in an MCS index table. The modulation scheme corresponding to at least one group of parameters in the MCS
index table is RAPSK modulation.
The device for data transmission according to this embodiment is configured to perform the method for data transmission applied to the first communication node as described with respect to FIG .2, with similar scheme and technical effects, and which will not be repeated here.
In an embodiment, the MCS index table includes at least one of, MCS index values;
modulation order; target code rate; spectrum efficiency; number of concentric rings; number of constellation points on each concentric ring or different modulation phases on each concentric ring;
number of bits for amplitude mapping; number of bits for phase mapping;
minimum radius; inter-ring distance; or RAPSK modulation mapping scheme.
In an embodiment, the modulation scheme corresponding to at least one MCS
index value in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, the modulation order of the QAM
modulation is the maximum modulation order in the MCS index table.
In an embodiment, the modulation scheme corresponding to the maximum spectral efficiency in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, when the modulation order is "4", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 1.3 and less than 3.1.
In an embodiment, in the MCS index table, when the modulation order is "6", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 2.5 and less than 5.2.
In an embodiment, in the MCS index table, when the modulation order is "8", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 4.5 and less than 7.1.

In an embodiment, in the MCS index table, when the modulation order is "10", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 6.5 and less than 9.3.
In an embodiment, the RAPSK modulation includes RAPSK with Gray mapping.
FIG. 7 depicts a schematic block diagram showing a device for data transmission according to another embodiment of the present disclosure. This embodiment is directed to a device for data transmission. The device for data transmission is a second communication node. As shown in FIG. 7, the device in this embodiment includes a receiver 710.
The receiver 710 is configured to receive an MCS index value sent by a first communication node.
The MCS index value is indicative of one group of parameters in an MCS index table. The modulation corresponding to at least one group of parameters in the MCS index table is RAPSK
modulation.
The device for data transmission according to this embodiment is configured to perform the method for data transmission applied to the second communication node as described with respect to FIG .3, with similar scheme and technical effects, and which will not be repeated here.
In an embodiment, the MCS index table includes at least one of, MCS index values;
modulation order; target code rate; spectrum efficiency; number of concentric rings; number of constellation points on each concentric ring or different modulation phases on each concentric ring;
number of bits for amplitude mapping; number of bits for phase mapping;
minimum radius; inter-ring distance; or RAPSK modulation mapping scheme.
In an embodiment, the modulation scheme corresponding to at least one MCS
index value in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, the modulation order of the QAM
modulation is the maximum modulation order in the MCS index table.
In an embodiment, the modulation scheme corresponding to the maximum spectral efficiency in the MCS index table is QAM modulation.
In an embodiment, in the MCS index table, when the modulation order is "4", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 1.3 and less than 3.1.
In an embodiment, in the MCS index table, when the modulation order is "6", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 2.5 and less than 5.2.
In an embodiment, in the MCS index table, when the modulation order is "8", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 4.5 and less than 7.1.
In an embodiment, in the MCS index table, when the modulation order is "10", the spectral efficiency corresponding to the RAPSK modulation scheme is greater than 6.5 and less than 9.3.
In an embodiment, the RAPSK modulation includes RAPSK with Gray mapping.
FIG. 8 depicts a schematic block diagram showing an apparatus for data transmission according to an embodiment of the present disclosure. As shown in FIG. 8, the apparatus includes a processor 810, a memory 820, and a communication module 830. The apparatus may be provided with one or more processors 810, while FIG. 8 shows one by way of example. One or more memory 820 may be provided within the apparatus, while FIG. 8 shows one by way of example. Processor 810, memory 820 and communication module 830 can be connected by a bus or other means. The connection is shown as bus by way of an example in FIG. 8. In this embodiment, the apparatus can be a base station.
As a computer-readable storage medium, memory 820 may be configured to store software programs, computer-executable programs and modules, such as program instructions/modules corresponding to the device for data transmission as described in any one of the embodiments of the present disclosure, such as the transmitter 610 in the device for data transmission. The memory 820 may generally include a program storage section and a data storage section, in which the program storage section may store an operating system and application programs for performing at least one operation, and data storage section may store data created according to the operation of the apparatus, or the like. In addition, the memory 820 can include a high-speed random access memory and a nonvolatile memory, such as at least one disk memory device, a flash memory device, or other nonvolatile solid-state memory devices. In some implementations, the memory 820 may include memories remotely located relative to the processor 810, and these remote memories may be connected to the apparatus through a network. Examples of the above networks include, but are not limited to, the Internet, intranet, local area network, mobile communication network, and combinations thereof.
The communication module 830 is configured to perform communication interaction between a first communication node and a second communication node.

In a case where the device for data transmission is the first communication node, the provided device can be configured to performed the method for data transmission method applied to the first communication node according to any of the above embodiments, and has corresponding functions and effects.
In a case where the device for data transmission is the second communication node, the provided device can be configured to performed the method for data transmission method applied to the second communication node according to any of the above embodiments, and has corresponding functions and effects.
An embodiment of the present disclosure further provides a storage medium containing a computer-executable instruction which, when executed by a computer processor, causes the processor to carry out the method for data transmission applied to a first communication node, the method includes, sending a modulation and coding scheme (MCS) index value to a second communication node, where the MCS index value is indicative of one of a plurality sets of parameters in an MCS index table; and at least one set of the plurality sets of parameters in the MCS index table corresponds to Regular Amplitude Phase Shift Keying (RAPSK) modulation.
An embodiment of the present disclosure further provides a storage medium containing a computer-executable instruction which, when executed by a computer processor, causes the processor to carry out the method for data transmission applied to a second communication node, the method includes, receiving a Modulation and Coding Scheme (MCS) index value sent by a first communication node; where the MCS index value is indicative of one of a plurality sets of parameters in an MCS index table; and at least one set of the plurality sets of parameters in the MCS index table corresponds to Regular Amplitude Phase Shift Keying (RAPSK) modulation.
It should be understood by those having ordinary skills in the art that the term user equipment covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser, or a vehicle-mounted mobile station.
Generally, various embodiments of the present disclosure may be implemented as hardware or dedicated circuits, software, logic or any suitable combination thereof.
For example, some aspects may be implemented as hardware, while other aspects may be implemented as firmware or software executable by a controller, microprocessor or other computing device, although the present disclosure is not limited thereto.

Some embodiments of the present disclosure can be implemented by a data processor of a mobile device executing computer program instructions, for example, in a processor entity, or by hardware, or by a combination of software and hardware. Computer program instructions can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.
The block diagram of any logic flow in the drawings of the present disclosure may represent program process, or may represent interconnected logic circuits, modules and functions, or may represent the combination of program process and logic circuits, modules and functions. Computer programs can be stored in the memory. The memory can be of any type suitable for the local technical environment and can be realized with any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical memory devices and systems like Digital Video Disc (DVD), or Compact Disk (CD) etc. Computer-readable media may include non-transitory storage media. The data processor can be of any type suitable for the local technical environment, such as but not limited to a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (FGPA) and a processor based on a multi-core processor architecture.
Some embodiments of the present disclosure are described above, However, the present disclosure is not limited by those embodiments described. Various modifications and alternations can be made by those having ordinary skill in the art. Any modifications, equivalents, alternations, or improvements, made within the concepts of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims (13)

What is claimed is:
1. A method for data transmission, applied to a first communication node, the method comprising, sending a Modulation and Coding Scheme (MCS) index value to a second communication node;
wherein, the MCS index value is indicative of one sets of parameters of a plurality sets of parameters in an MCS index table; and at least one set of the plurality sets of parameters in the MCS index table correspond to Regular Amplitude Phase Shift Keying (RAPSK) modulation.
2. The method as claimed in claim 1, wherein the MCS index table comprises at least one of, MCS index value; modulation order; target code rate; spectrum efficiency;
number of concentric rings; number of constellation points on each concentric ring or different modulation phases on each concentric ring; number bits for amplitude mapping; number of bits for phase mapping;
minimum radius; inter-ring distance; or RAPSK modulation mapping scheme.
3. The method as claimed in claim 2, wherein at least one MCS index value in the MCS index table corresponds to Quadrature Amplitude Modulation (QAM) modulation.
4. The method as claimed in claim 3, wherein in the MCS index table, a modulation order of the QAM modulation is the maximum modulation order in the MCS index table.
5. The method as claimed in claim 3, wherein a modulation scheme corresponding to the maximum spectral efficiency in the MCS index table is the QAM modulation.
6. The method as claimed in claim 2, wherein, in the MCS index table, a spectral efficiency corresponding to the RAPSK modulation scheme is configured to be greater than 1.3 and less than 3.1, in response to the modulation order being 4.
7. The method as claimed in claim 2, wherein, in the MCS index table, a spectral efficiency corresponding to the RAPSK modulation scheme is configured to be greater than 2.5 and less than 5.2, in response to the modulation order being 6.
8. The method as claimed in claim 2, wherein, in the MCS index table, a spectral efficiency corresponding to the RAPSK modulation scheme is configured to be greater than 4.5 and less than 7.1, in response to the modulation order being 8.
9. The method as claimed in claim 2, wherein, in the MCS index table, a spectral efficiency corresponding to the RAPSK modulation scheme is configured to be greater than 6.5 and less than 9.3, in response to the modulation order being 10.
10. The method as claimed in any one of claim 1 to claim 9, wherein the RAPSK
modulation comprises RAPSK with Gray mapping.
11. A method for data transmission, applied to a second communication node, the method comprising, receiving a Modulation and Coding Scheme (MCS) index value sent by a first communication node;
wherein, the MCS index value is indicative of one set of parameters of a plurality sets of parameters in an MCS index table; and at least one set of the plurality sets of parameters in the MCS index table corresponds to Regular Amplitude Phase Shift Keying (RAPSK) modulation.
12. An apparatus for data transmission, comprising: a communication module, a memory, and at least one processor; wherein, the communication module is configured to perform communication interaction between a first communication node and a second communication node; and the memory is configured to store at least one program which, when executed by the at least one processor, causes the at least one processor to carry out the method as claimed in any one of claims 1 to 10, or the method as claimed in claim 11.
13. A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to carry out the method as claimed in any one of claims 1 to 10, or the method as claimed in claim 11.
CA3221193A 2021-06-02 2022-05-12 Data transmission method, device, and storage medium Pending CA3221193A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN202110615507.8A CN115441985A (en) 2021-06-02 2021-06-02 Data transmission method, device and storage medium
CN202110615507.8 2021-06-02
PCT/CN2022/092427 WO2022252952A1 (en) 2021-06-02 2022-05-12 Data transmission method, device, and storage medium

Publications (1)

Publication Number Publication Date
CA3221193A1 true CA3221193A1 (en) 2022-12-08

Family

ID=84272193

Family Applications (1)

Application Number Title Priority Date Filing Date
CA3221193A Pending CA3221193A1 (en) 2021-06-02 2022-05-12 Data transmission method, device, and storage medium

Country Status (4)

Country Link
EP (1) EP4351050A1 (en)
CN (1) CN115441985A (en)
CA (1) CA3221193A1 (en)
WO (1) WO2022252952A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117713885A (en) * 2024-02-06 2024-03-15 荣耀终端有限公司 Communication method, communication device and communication system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102752261B (en) * 2011-04-20 2015-06-17 清华大学 Constellation mapping method based on absolute phase shift keying (APSK) constellation map, coded modulation method and system
LU100477B1 (en) * 2017-10-13 2019-05-22 Univ Luxembourg Method and device for adaptive coding and modulation
CN112583759B (en) * 2019-09-27 2022-04-22 华为技术有限公司 Information transmission method and communication device
CN111901067A (en) * 2020-02-12 2020-11-06 中兴通讯股份有限公司 Configuration and receiving method, device and equipment and storage medium

Also Published As

Publication number Publication date
EP4351050A1 (en) 2024-04-10
WO2022252952A1 (en) 2022-12-08
CN115441985A (en) 2022-12-06

Similar Documents

Publication Publication Date Title
KR102197700B1 (en) Transmitting apparatus and modulation method thereof
US9929813B1 (en) Optical communication system and method using a nonlinear reversible code for probablistic constellation shaping
EP3469743B1 (en) Optical data coding method and optical transmitter
KR100987269B1 (en) High-order modulation-based burst mapping method and apparatus in mobile telecommunication systems
KR102367380B1 (en) non-uniform(NU) constellation
US9337935B2 (en) Coded modulation for small step-size variable spectral efficiency
US20140369680A1 (en) Variable spectral efficiency optical modulation schemes
EP2137922B1 (en) USF coding
EP3434000B1 (en) Method for flexible sparse code multiple access codebook design, transmission and detection
CN108667555A (en) A kind of phase adjusting method, relevant device and communication system
CN104202281B (en) Multi-element code modulates mapping method and device
EP3080936B1 (en) Coded modulation for small step-size variable spectral efficiency
US9900105B1 (en) Coded modulation with amplitude and phase-shift keying having a circular constellation for variable spectral efficiency
US7630453B2 (en) Multi-level modulation method and system
CA3221193A1 (en) Data transmission method, device, and storage medium
JP4220353B2 (en) Modulation apparatus, mobile communication system, modulation method, and communication method
US7006578B2 (en) Constellation mapping for modulated communications
US8995573B1 (en) Octagonal quadrature amplitude modulation
US10567209B1 (en) Geometrically shaping QAM modulation
KR20240010022A (en) Data transmission methods, communication nodes, and computer-readable storage media
Vandana et al. A Review of Constellation Shaping and BICM-ID of Ldpc Codes for DVB-S2 Systems
CN116132244A (en) Data processing method, module, electronic device and storage medium
KR20040103530A (en) Method for mapping bit in coded modulation system

Legal Events

Date Code Title Description
EEER Examination request

Effective date: 20231201

EEER Examination request

Effective date: 20231201

EEER Examination request

Effective date: 20231201